Radiation Risk Assessment Tool Information - Version 4.3.1

Enter the inputs in the form below or upload an input file.

Demographic Information

Gender:
Birth Year:
Population:

Smoking History

A history of smoking will affect the risk of lung cancer, but also the risk of cancers other than lung, because smokers have a different life expectancy compared to the average population. Smoking history is only applicable for the "U.S. 2000-2005" population.

Include Smoking History Adjustment

Cigarettes/Day:
Year Started Smoking:
Year Quit Smoking: (leave blank if never quit)

Exposure Information

An exposure event may result in absorbed doses to one or more organs, specified in Gy, mGy, rad or mrad. All doses associated with the same event should be indicated by entering the same number in the "Exposure Event" column and the same year in the "Exposure Year" column. Refer to Guidance for Entering Exposure Information.

Each absorbed organ can be specified either with no uncertainty or with uncertainty. For doses specified with no uncertainty, a constant value equal to the average dose to the organ should be applied by selecting "Fixed Value" from the Distribution Type menu and typing the value into the "Parameter 1" column. For organ doses specified with uncertainty, one of the probability distributions from the Distribution Type menu should be selected: lognormal (GM, GSD), normal (mean, standard deviation), triangular or log-triangular (minimum, mode, maximum), and uniform or log-uniform (minimum, maximum). The corresponding distribution parameters should be entered into columns 1, 2, and/or 3.

In cases of uniform, whole-body exposure, a single, whole-body dose (either uncertain or constant) is applied to all cancer sites including the remainder grouping of cancers by selecting "Apply doses to all organs" from the Organ type menu. In cases of non-uniform, whole-body exposures the user needs to provide organ-specific doses, including a dose to the remainder grouping of cancers. The latter dose could be a weighted average of doses to affected organs. In many cases, exposures of the remainder organs are rather uniform, so the weighted dose would be similar to the unweighted dose and could be applied in most cases.

No.	Exposure Event	Exposure Year	Organ	Exposure Rate	Organ Dose:				Delete Action
No.	Exposure Event	Exposure Year	Organ	Exposure Rate	Distribution Type	Parameter 1	Parameter 2	Parameter 3	Delete Action
1	Exposure Event:	Exposure Year:	Organ:	Organ:	Organ Dose (mGy) Distribution:	Parameter 1:	Parameter 2:	Parameter 3:
	Exposure Event:	Exposure Year:	Organ:	Organ:	Organ Dose (mGy) Distribution:	Parameter 1:	Parameter 2:	Parameter 3:	Delete:

+ Assumptions, Settings and Report Options

These settings allows the user to control two sampling parameters, sample size and the random seed for sampling.

Simulation Sample Size:
Random Seed:

The reported future lifetime risk represents the risk from the "Current Year" to the end of the expected lifetime. By default, the current year is determined automatically, based on computer settings. However, for the purpose of testing alternative scenarios, different years may be selected.

Current Year Setting:

The User Defined Adjustment Factor is a multiplicative bias parameter that can be used to adjust the estimated lifetime risk to account for additional sources of uncertainty or bias not presently included in the methodology for estimation of lifetime risk.

NOTE: The default setting, a fixed value of 1 entered in the Parameter 1 column, allows the calculation of lifetime risk to proceed without any additional adjustments. Changing the default settings should be done when there is sufficient justification for applying a bias correction.

Distribution Type:
Distribution Parameter 1:
Distribution Parameter 2:
Distribution Parameter 3:

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